关于疏水涂层对3D悬崖体周围流量分离的影响的实验研究
Naseeb Ahmed Siddiqui1, Martin Agelin-Chaab2
1Engineering Cluster, Singapore Institute of Technology, Singapore, 828608 Singapore.
Advances in aerodynamics
|January 1, 2026
概括
疏水涂层改变了悬崖体上的流量分离. 标准的艾哈迈德体表现出增加的重新连接长度,而圆体则经历了轻微的变,根据流动特征表现出不同的效应.
科学领域:
- 流体动力学 流体动力学
- 表面科学是一门学科.
背景情况:
- 流量分离是3D悬崖体空气动力学中的一个关键现象.
- 了解表面特性对流动动态的影响对于车辆设计至关重要.
研究的目的:
- 为了研究疏水涂层对3D悬崖体流分离结构的影响.
- 为了比较标准的艾哈迈德体 (SAB) 部分分离和圆的艾哈迈德体 (EAB) 完全分离的影响.
主要方法:
- 在水道中利用时间分辨率和标准粒子图像速度计 (PIV).
- 在SAB和EAB模型上涂上超常干的疏水涂料.
- 在流量分析中使用正确的直角分解 (POD) 和动态模式分解 (DMD).
主要成果:
- 疏水涂层使SAB的重新连接长度增加了80%并减少了剪切应力.
- 在EAB上涂层导致回循环长度减少6%.
- 对于这两个体,都观察到斯特鲁哈尔数和主导频率的明显变化.
结论:
- 疏水涂层显著改变3D悬崖体的流量分离特性.
- 疏水涂层的影响取决于身体固有的流量分离行为.
- 研究结果提供了通过表面处理对空气动力学操纵的见解.
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